Window fastener



June 19, 1928. 1,674,221

T. A. PREEN ET AL 4 WINDOW FASTENER Filed Dec. 27, 1925 5 I FIV'GNZL 0715',

5G6? A a) 2 f Patented June 19, 1928.

UNI ED stares NTQ IF THOMAS ABBAHAM'PREEN 'AND THOMAS ALEXANDER PREEN, OF WESTMINSTER,

' LONDON, ENGLAND. i

' WINDOW FASTENER.

Application field December 27, 192 Serial No. 157,366, and in Great Britain February. 20,1926] This invention has for its object to provide I an improved window fastener forsecurely fastening a sash window in the closed .or open or any partially open position to which it may be moved. r

v According to the present invention we employ two parallel racks arranged at a right angle, or other suitable angle on the window frame and sliding sash respectively in combination with an angular bolt so mounted and arranged that itsgopposite ends may be moved or slidden into and out of engagement with both racks to latch and release the window sashes, an auxiliary catch or bolt being in some cases provided to latch the angular bolt in its operative and inoperative positions.

The accompanying drawings show one construction of the improved window fastener and a modification thereof.

In the drawings, Fig. 1 is a front elevation of the improved fastening fitted to a sash window, only part of which is shown.

Fig. 2 is a part sectional side View of Fig. 1.

Fig. 3 is a plan of the latch bolt with part of casing removed. Q

Fig. 4 is a section showing a modification.

In the construction shown in Figs. 1, 2 and 3, a and b are the upper and lower 30 sashes of the window, 0 and d are, two parallel racks with ratchet teeth, the rack 0 being mounted on the side of the window frame and the other rack (Z on the face of the upper window sash a so that the teeth of the said racks project at right angles the one to the other.

On the top of the window sash b in the left hand corner thereof is mounted a latch. bolt 6 having two engaging parts ornoses e and e at its opposite ends arranged at a right angle so as to engage with the respective racks 0 and d.

The said latch bolt 6 is mounted in a suitable casing f and is adapted to slide back and forth thereon on suitable guide spindles g, Fig. 3, around which are fitted springs h arranged to bear upon transverse lugs z' and press the bolt e inwards.

The outer end of the bolt e is made with a lateral extension forming the nose 6', so

that when the bolt 9 is pulled forward the nose e passes clear of the rack' 0 at the same time that the rearward'nose 0 passes out of engagement with the rack d, thereby 5c unfastening both of the window sashes. The

forward end ofthe bolt 6 may be conveniently of T shape as shown to form a'stop for limiting the rearward movement of the bolt. 1

An auxiliary spring urged catch is provided on "the top of thebolt casing f for the as shown in Fig. 4, a catch 7" may form part of'a lock Z provided with a removable key Z.

In use, assuming the fastening to be unlocked, the window sashes a and b are moved to any desired position either open, closed, or partially open, and then the catch j is raised to release the bolt 6 which slides backwards under the action of its spring until the noses e and e of the said bolt engage with the respective racks 0 and J, the catch j is released and enters the corresponding recess in the bolt e and dogs the same in the forward position when the window sashes are effectively fastened in the position to which they have been moved.

To unfasten the window the catch 9' is raised by one hand and the latch bolt 6 is pulled forward by the other hand so that the noses e and e of the bolt e disengage from the racks a and 03 when the window sashes are free to be slidden up and down as required. o

By the use of a lock and key as shown in Fig. 4, the removal of the key prevents the window being altered until the key is returned to the lock and the parts operated as described.

In this way the sash window can be securely fastened in the closed, open, or partially open positionas even with a restricted access to the fastening from a partially.

opened window the bolt is very difficult to release with the arrangement shown in Figs. 1 to 3,-whilst from the interior of the win dow the fastening can be quickly released and the window adjusted as required.

By the use of a lock and key arrangement such as shown in Fig. 4 any movement of the fastening is prevented until the key is in the lock.

In the arrangement illustrated the noses e and e of the latch bolt 6 are placed at right angles, but it will be readily understood that by suitable modifications the bolt 6 may lie at an angle so as to engage two racks such as a and d as long as the bolt 6 is adapted to slide transversely of one rack, and the bolt'e might even mounted on a vertical pivot 'so"as"to move into and out'of engagement with the racks by a rotary movementy the olearance-"between the latch bolt and the racks being appropriately arranged.

What We claim as our inventionai1d"'-de sire to secure by Letters Patent is g AvvinddW fastener of th cl'ass' referredto comprising the combination of two parallel racks "With ratchetsh'aped teeth arranged I at an angle, the one to the other and mounted, theone onthe' windoivfr'ameand"the other on the upper sliding sash respectively, a slidingnon-"rotary bolt having bevelled edges and a bevelled nose and resenting said bevelled nose and one bevellededge for engagement and disengagement with theteeth of'said racks, and a-retnrn spring-for said bolt, a casing carrying said bolt and holding simmer-against rotation,- a spring surged catch sash and bapable of sliding I transversely of one rack to engage" and disengage with both racks.

THOMAS ABRAHAM PREEN. THOMAS ALEXANDERILPREEN. 

